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www.reference.com/article/dogs-e3fe6d053183a353

Modern domestic dogs are descended from the European wolf. Humans have been selectively breeding dogs only for the last few hundred years, and they are still refining breeds with traits such as superior intelligence and sense of smell. The American Kennel Club recognizes 178 breeds of dog and catego

www.reference.com/article/general-dogs-3a737614952cd2e0

The close relationship between man and dog has endured for many thousands of years. The world's oldest fossilized pet dog carcass was located in Siberia in the 1970s, according to AnimalPlanet.com. It dates back 33,000 years. The fossilized remains demonstrate the enduring status of the dog as man's

www.reference.com/article/interesting-dogs-cdc8bd8e204ca4b8

Some interesting facts about dogs are that there are more than 150 dog breeds, an adult dog has 42 teeth, and they sweat through their foot pads rather than through salivating. Almost all dogs have pink tongues except Chow Chows and Shar-peis, which have black tongues.

www.reference.com/article/service-dogs-4d6d2cd4121dec1f

Service dogs come in a variety of types such as armed service dogs, blind service dogs and hearing dogs. These dogs start training at birth to complete the requirements of their duties. These dogs often wear a vest so humans recognize that they are service dogs and are unlike their regular counterpa

www.reference.com/article/fun-dogs-8e7962522b35c134

There are hundreds of different breeds of dogs, one of which, a Newfoundland breed, has webbed feet and a water-resistant coat. This breed was created to rescue drowning people and to help fisherman haul nets.

www.reference.com/article/dogs-puppies-b56cb3f9bcd3d6c9

Most dogs can understand up to 250 words and phrases making them as intelligent as the average 2-year-old child. Puppies have 28 teeth and adult dogs have 42.

www.reference.com/article/wild-dogs-cc48c6a3cd4e7941

African wild dogs are highly social, and they range over large tracts of land. Each one has unique coloring and markings that help the animals distinguish one from another. Their coats have blotches of yellow, white, red, brown and black fur that earn wild dogs the nickname painted dogs.

www.reference.com/article/dog-barking-57e477de875c0a8f

Dogs bark for a variety of reasons, including to protect territory, to get attention, or merely just to signify that they feel bored, frustrated, playful or excited. Dogs with health issues such as Canine Cognitive Dysfunction or deafness sometimes bark without full realization of their behavior.

www.reference.com/article/dogs-think-92e8f9dab906e6a8

The average mindset of a dog is comparable to that of a two-year-old human. Though scientists have not been able to fully understand exactly what dogs think about, research has shown that dogs do think, learn, and even experience emotions.

www.reference.com/article/yorkie-dogs-7db494b94be66a93

Yorkshire Terriers were originally used to catch rats in clothing factories in 19th-century England. Yorkies are part of the terrier breed, which makes the animal brave, inquisitive and energetic in personality.